Color flat panel display sub-pixel arrangements and layouts for sub-pixel rendering with increased modulation transfer function response
Various embodiments of a sub-pixel octal grouping are disclosed. The octal grouping may comprise three-color sub-pixels with one colored sub-pixel comprising twice the number of positions within the octal sub-pixel grouping as the other two colored sub-pixels. Various embodiments for performing sub-pixel rendering on the sub-pixel groupings are disclosed.
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This application claims priority to U.S. Provisional Application No. 60/346,738 (“the '738 provisional application”), entitled “ARRANGEMENT OF SUB-PIXELS WITH DOUBLE BLUE STRIPES,” filed on Jan. 7, 2002, which is hereby incorporated herein by reference. This application is also a continuation-in-part of U.S. patent application Ser. No. 10/243,094, entitled “IMPROVED FOUR COLOR ARRANGEMENTS OF EMITTERS FOR SUB-PIXEL RENDERING,” filed on Sep. 13, 2002, now abandoned and published as United States Patent Publication No. 2004/0051724 (“the '724 application”). which is hereby incorporated herein by reference and is commonly owned by the same assignee of this application.
This application is also related to United States Patent Publication No. 2003/0117423 (“the '423 application”) [U.S. patent application Ser. No. 10/278,328,] entitled “IMPROVEMENTS TO COLOR FLAT PANEL DISPLAY SUB-PIXEL ARRANGEMENTS AND LAYOUTS WITH REDUCED BLUE LUMINANCE WELL VISIBILITY,” filed on Oct. 22, 2002; United States Patent Publication No. 2003/0090581 (“the '581 application”) [U.S. patent application Ser. No. 10/278,393,] entitled “COLOR DISPLAY HAVING HORIZONTAL SUB-PIXEL ARRANGEMENTS AND LAYOUTS,” filed on Oct. 22, 2002; and United States Patent Publication No. 2003/0128179 (“the '179 application”) [U.S. patent application Ser. No. 10/278,352,] entitled “IMPROVEMENTS TO COLOR FLAT PANEL DISPLAY SUB-PIXEL ARRANGEMENTS AND LAYOUTS FOR SUB-PIXEL RENDERING WITH SPLIT BLUE SUBPIXELS,” filed on Oct. 22, 2002. which are all hereby incorporated herein by reference and commonly owned by the same assignee of this application.
BACKGROUNDThe present application relates to improvements to display layouts, and, more particularly, to improved color pixel arrangements, means of addressing used in displays, and to data format conversion methods for these displays.
Full color perception is produced in the eye by three-color receptor nerve cell types called cones. The three types are sensitive to different wavelengths of light: long, medium, and short (“red”, “green”, and “blue”, respectively). The relative density of the three differs significantly from one another. There are slightly more red receptors than green receptors. There are very few blue receptors compared to red or green receptors.
The human vision system processes the information detected by the eye in several perceptual channels: luminance, chromanance, and motion. Motion is only important for flicker threshold to the imaging system designer. The luminance channel takes the input from only the red and green receptors. In other words, the luminance channel is “color blind”. It processes the information in such a manner that the contrast of edges is enhanced. The chromanance channel does not have edge contrast enhancement. Since the luminance channel uses and enhances every red and green receptor, the resolution of the luminance channel is several times higher than the chromanance channels. Consequently, the blue receptor contribution to luminance perception is negligible. The luminance channel thus acts as a spatial frequency signal band pass filter. Its peak response is at 35 cycles per degree (cycles/°). It limits the response at 0 cycles/° and at 50 cycles/° in the horizontal and vertical axis. This means that the luminance channel can only tell the relative brightness between two areas within the field of view. It cannot tell the absolute brightness. Further, if any detail is finer than 50 cycles/°, it simply blends together. The limit in the horizontal axis is slightly higher than the vertical axis. The limit in the diagonal axes is somewhat lower.
The chromanance channel is further subdivided into two sub-channels, to allow us to see full color. These channels are quite different from the luminance channel, acting as low pass filters. One can always tell what color an object is, no matter how big it is in our field of view. The red/green chromanance sub-channel resolution limit is at 8 cycles/°, while the yellow/blue chromanance sub-channel resolution limit is at 4 cycles/°. Thus, the error introduced by lowering the red/green resolution or the yellow/blue resolution by one octave will be barely noticeable by the most perceptive viewer, if at all, as experiments at Xerox and NASA, Ames Research Center (see, e.g., R. Martin, J. Gille, J. Larimer, Detectability of Reduced Blue Pixel Count in Projection Displays, SID Digest 1993) have demonstrated.
The luminance channel determines image details by analyzing the spatial frequency Fourier transform components. From signal theory, any given signal can be represented as the summation of a series of sine waves of varying amplitude and frequency. The process of teasing out, mathematically, these sine-wave-components of a given signal is called a Fourier Transform. The human vision system responds to these sine-wave-components in the two-dimensional image signal.
Color perception is influenced by a process called “assimilation” or the Von Bezold color blending effect. This is what allows separate color pixels (also known as sub-pixels or emitters) of a display to be perceived as a mixed color. This blending effect happens over a given angular distance in the field of view. Because of the relatively scarce blue receptors, this blending happens over a greater angle for blue than for red or green. This distance is approximately 0.25° for blue, while for red or green it is approximately 0.12°. At a viewing distance of twelve inches, 0.25° subtends 50 mils (1,270μ) on a display. Thus, if the blue pixel pitch is less than half (625μ) of this blending pitch, the colors will blend without loss of picture quality. This blending effect is directly related to the chromanance sub-channel resolution limits described above. Below the resolution limit, one sees separate colors, above the resolution limit, one sees the combined color.
The accompanying drawings, which are incorporated in, and constitute a part of this specification illustrate various implementations and embodiments disclosed herein.
Reference will now be made in detail to implementations and embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Sub-Pixel Arrangements
In
In another embodiment, the colors are assigned as red 104, blue 102, and non-luminance balanced green 106. Since there are twice as many green 106 as there are of the other two colors, red 104 and blue 102, the result is a pleasing white point when all sub-pixels are illuminated fully.
In this or another color assignment embodiment, the sub-pixel aspect ratios may be adjusted so that the display array 100 consists of square repeat cell groups 120. This will put the majority color sub-pixel emitter 106 on a square grid. It will also put the minority color sub-pixel emitters 102 and 104 on, or nearly on, an idealized “checkerboard”. For an example of another color assignment embodiment, sub-pixels 106 could be assigned the color red and sub-pixels 104 could be assigned the color green in
Not only may the green or the red sub-pixels occupy the majority colored sub-pixels in octal octal grouping 120, but the blue sub-pixels may also occupy the majority sub-pixels. Such an arrangement was previously disclosed in '738 provisional application. Thus, all three colors—red, green, and blue—may occupy the majority sub-pixel position in this grouping. Additionally, while the colors—red, green and blue—have been used for the purposes of illustrating the present embodiments, it should be appreciated that another suitable choice of three colors—representing a suitable color gamut for a display—may also suffice for the purposes of the present invention.
As shown in
As subpixel shapes may vary under the scope of the present invention, so too may the exact positions of the subpixels be varied under the scope of the present invention. For example,
Other embodiments of the octal groupings are also possible.
Yet other embodiments of the present invention are possible. For example, the entire octal subpixel groupings may be rotated 90 degrees to reverse the roles of row and column driver connections to the grouping. Such a horizontal arrangement for subpixels is further disclosed in the co-pending application United States Patent Publication No. 2003/0090581 (“the '581 application”) entitled “COLOR DISPLAY HAVING HORIZONTAL SUB-PIXEL ARRANGEMENTS AND LAYOUTS” and is incorporated by reference.
The alternating “checkerboard” of emitters is similar to the red and green “checkerboard” that was disclosed in co-pending and commonly assigned United States Patent Publication No. 2002/0015110 (“the '110 application”) [U.S. patent application Ser. No. 09/916,232] entitled “ARRANGEMENT OF COLOR PIXELS FOR FULL COLOR IMAGING DEVICES WITH SIMPLIFIED ADDRESSING,” filed on Jul. 25, 2001, using sub-pixel rendering such as that described in cop-ending United States Patent Publication No. 2003/0103058 (“the '058 application”) [U.S. patent application Ser. No. 10/150,355] entitled “METHODS AND SYSTEMS FOR SUB-PIXEL RENDERING WITH GAMMA ADJUSTMENT,” filed on May 17, 2002. These co-pending applications are hereby incorporated herein by reference. The methods described in the above co-pending applications may be modified for the embodiments disclosed herein.
The drive timing and method may be any of those known in the art for N×M drive matrices as those shown. However, there may be modifications needed due to the specific color assignments, particularly any checkerboard across the panel or color alternations within a single column. For example, the technique known in the art as “Multi-Row Addressing” or “Multi-Line Addressing” for passive LCD may be modified such that groupings of rows are restricted to odd and even row combinations. This will reduce potential color crosstalk since, within a column with two alternating color sub-pixels, only one color will be addressed at a time.
Inversion schemes, switching the electrical field polarity across the display cell to provide a time averaged zero net field and ion current across the cell, can be applied to the embodiments disclosed herein.
Data Format Conversion
For one embodiment of data format conversion using area resampling techniques,
The above referenced '058 patent application describes the method used to convert the incoming data format to that suitable for the display. In such a case, the method proceeds as follows: (1) determining implied sample areas for each data point of incoming three-color pixel data; (2) determining a resample area for each color sub-pixel in the display; (3) forming a set of coefficients for each resample area, the coefficients comprising fractions whose denominators are a function of the resample area and whose numerators are a function of an area of each implied sample area that may partially overlap the resample area; (4) multiplying the incoming pixel data for each implied sample area by the coefficient resulting in a product; and (5) adding each product to obtain luminance values for each resample area.
Examining a “one-to-one” format conversion case for the resample operation illustrated in
Adaptive filtering techniques can also be implemented with the pixel arrangements disclosed herein, as further described below.
Again, the green resample uses a unitary filter. The red and blue color planes use a very simple 1×2 coefficient filter: [0.5 0.5]
An adaptive filter, similar to that disclosed in the co-pending and commonly assigned United States Patent Publication No. 2003/0085906 (“the '906 application”) [U.S. patent application Ser. No. 10/215,843] entitled “METHODS AND SYSTEMS FOR SUB-PIXEL RENDERING WITH ADAPTIVE FILTERING,” filed on Aug. 8, 2002, which is hereby incorporated herein by reference, can be adopted so as not to require a 3×3 sample of input data, which uses a minimum of two lines of memory. The test may be based on a smaller sample of input data, for example 1×3 or 1×2 matrices. The green data is sampled to test for vertical or diagonal lines and then the red and blue data adjacent to the green test point may be changed.
So, an adaptive filter test could be implemented as follows to test to see if a high contrast edge is detected: compare the green data (G) to a min value and a max value—if G<min or G>max, then a register value is set to 1, otherwise the register value is set to 0; compare the register values for three successive green data points to test masks to see if an edge is detected; if detected then take an appropriate action to the red and/or blue data—e.g. apply gamma or apply a new value or different filter coefficient.
The following table is illustrative of this embodiment:
For the example above, an edge has been detected and there is an array of options and/or actions to take at this point. For example, the gamma correction could be applied to the output of the box filter for red and/or blue; or a new fixed value representing the output required to balance color could be used; or use a new SPR filter.
The test for black lines, dots, edges and diagonal lines are similar in this case, since only three values are examined:
In the above table, the first row could represent a black pixel with white pixels on either side. The second row could represent an edge of a black line or dot. The third row could represent an edge of a black line in a different location. The binary numbers are used as an encoding for the test.
The test for white lines, dots, edges, and diagonal lines might be as follows:
If the tests are true and the high and low tests are, for example, 240 and 16 (out of 255) respectively, then the output value for these edges using the box filter might be 128+/−4—or some other suitable value. The pattern matching is to the binary numbers shown adjacent to the register values. A simple replacement of 128 raised to an appropriate gamma power could be output to the display. For example, for gamma=2.2, the output value is approximately 186. Even though the input may vary, this is just an edge correction term so a fixed value can be used without noticeable error. Of course, for more precision, a gamma lookup table could likewise be used. It should be appreciated that a different value, but possibly similar, of correction could be used for white and black edges. It should likewise be appreciated that as a result of detecting an edge, the red and/or blue data could be acted on by a different set of filter coefficients—e.g. apply a [1 0] filter (i.e. unity filter) which would effectively turn off sub pixel rendering for that pixel value.
The above tests were primarily for a green test, followed by action on red and blue. Alternatively, the red and blue can be tested separately and actions taken as needed. If one desired to only apply the correction for black and white edges, than all three color data sets can be tested and the result ANDed together.
A further simplification could be made as follows. If only two pixels in a row are tested for edges, then the test above is further simplified. High and low thresholding may still be accomplished. If [0 1] or [1 0] is detected, then a new value could be applied—otherwise the original value could be used.
Yet another simplification could be accomplished as follows (illustrated for the red): subtract the red data value, Rn, from the red value immediately to the left, Rn−1,; if the delta is greater than a predetermined number—say for example 240—then an edge is detected. If an edge is detected, one could substitute a new value, or apply gamma, output the value Rn to the display, or apply new SPR filter coefficients; otherwise, if no edge is detected, output the results of the box filter to the display. As either Rn or Rn−1 may be larger, the absolute value of the delta could be tested. The same simplification could occur for the blue; but the green does not need to be tested or adjusted, if green is the split pixel in the grouping. Alternatively, a different action could be taken for falling edges (i.e. Rn−Rn−1<0) and rising edges (i.e. Rn−Rn−1>0).
The results are logical pixels 600 and 601 that have only three sub-pixels each. For a white dot and using a box filter for red and blue data, the green sub-pixels 106 are set to 100% as before. The nearby red 104, as well as the nearby blue 102, could be all set to 50%. The resample operation of inter-color-plane-phase relationship 610 of
Both of the above data format conversion methods match the human eye by placing the center of logical pixels at the numerically superior green sub-pixels. The green sub-pixels are each seen as the same brightness as the red sub-pixel, even though half as wide. Each green sub-pixel 106 acts as though it were half the brightness of the associated logical pixel at every location, while the rest of the brightness is associated with the nearby red sub-pixel illuminated. Thus, the green serves to provide the bulk of the high resolution luminance modulation, while the red and blue provide lower resolution color modulation, matching the human eye.
Note that the two columns add up to 0.5 each, similar to the coefficients for the red and blue resample filter operation for the inter-color-plane-phase relationship 610 of
This inter-color-plane-phase relationship 700 shown in
While the invention has been described with reference to exemplary embodiments, it will be understood that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings without departing from the essential scope thereof. For example, some of the embodiments above may be implemented in other display technologies such as Organic Light Emitting Diode (OLED), ElectroLumenscent (EL), Electrophoretic, Active Matrix Liquid Crystal Display (AMLCD), Passive Matrix Liquid Crystal display (AMLCD), Incandescent, solid state Light Emitting Diode (LED), Plasma Display Panel (PDP), and Iridescent. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims
1. A method of converting incoming three-color pixel data of a first format for rendering onto a display panel; said display panel comprising a plurality of a sub-pixel group; said sub-pixel group further comprising eight sub-pixels; wherein each said sub-pixel is one of a first color sub-pixel, a second color sub-pixel and a third color sub-pixel; wherein said sub-pixel group further comprises four sub-pixels of said first color, two sub-pixels of said second color and two sub-pixels of said third color; wherein further said sub-pixels of said second color and said sub-pixels of said third color form substantially a checkerboard pattern; the method comprising:
- determining implied sample areas for each data point of said incoming three-color pixel data;
- determining a resample area for each color sub-pixel on said display panel;
- forming a set of coefficients for each resample area, said coefficients comprising fractions whose denominators are a function of the resample area and whose numerators are a function of an area of each implied sample area that may partially overlap said resample area;
- multiplying the incoming pixel data for each implied sample area by a coefficient resulting in a product; and
- adding each product to obtain a luminance value for said color sub-pixel on said display panel represented by each resample area.
2. The method as recited in claim 1 wherein a plurality of resample areas for each color sub-pixel in the display forms a resample area array, and wherein the method further comprises:
- determining a phase relationship among the resample area arrays for each color sub-pixel.
3. The methods as recited in claim 2 wherein determining a phase relationship further comprises:
- positioning resample points for each said color resample areas such that the resample points for said second color and said third color substantially overlay the resample points for said first color.
4. The method as recited in claim 1 wherein said first color is green, and said second and third colors are red and blue respectively;
- wherein said set of coefficients for said resample areas for the green color comprises a unity filter; and
- wherein said set of coefficents for said resample areas for the red and blue colors are each a 3×3 filter coefficient matrix.
5. The method as recited in claim 1 wherein said unity filter is centered to substantially match an input pixel by adjusting said unity filter with respect to a sub-pixel grid.
6. The method as recited in claim 1 wherein said eight sub-pixels of said sub-pixel group are disposed in two rows of four sub-pixels, and wherein two sub-pixels of said first color, one sub-pixel of said second color and one sub-pixel of said third color are disposed in each of said two rows.
7. The method as recited in claim 1 wherein said eight sub-pixels of said sub-pixel group are disposed in two rows of four sub-pixels, and wherein said checkerboard pattern is formed by one of said sub-pixel of said second color following one of said sub-pixel of said third color in a first row, and one of said sub-pixel of said third color following one of said sub-pixel of said second color in a second row.
8. The method as recited in claim 1 wherein a combined area of said two sub-pixels of said first color is substantially equal to the area of one of said sub-pixel of said second color and said sub-pixel of said third color.
9. The method as recited in claim 1 wherein said eight sub-pixels of said sub-pixel group are disposed in two rows of four sub-pixels, and wherein said sub-pixels of said first color are disposed in columns in said sub-pixel group.
10. The method as recited in claim 9 wherein a first one of said columns of said sub-pixels of said first color is offset from a second one of said columns of said sub-pixels of said first color in said sub-pixel group.
11. The method of claim 1 wherein said display panel is an element of a display system utilizing one of a group of display technologies, said group of technologies comprising passively addressed Liquid Crystal Display (LCD), ElectroLuminescent (EL) Display, Plasma Display, passively addressed Inorganic Light Emitting Diode, Organic Light Emitting Diode Display, Active Matrix Liquid Crystal Display (AMLCD), and Active Matrix Organic Light Emitting Diode Display (AMOLED).
12. A system comprising:
- a display panel, said display panel comprising a plurality of a sub-pixel group; said sub-pixel group comprising eight sub-pixels specifying an output data format; said sub-pixel group further comprising four sub-pixels of a first color, two sub-pixels of a second color and two sub-pixels of a third color; said sub-pixels of said second color and said sub-pixels of said third color substantially forming a checkerboard pattern;
- means for receiving input image data specified in an input data format different from said output data format; and
- means for subpixel rendering said input image data specified in said input data format to said output data format of said plurality of sub-pixel groups on said display panel.
13. The system as recited in claim 12 wherein said means for subpixel rendering input image data further comprises:
- means for determining implied sample areas for each data point of said input image data;
- means for determining a resample area for each color sub-pixel in the display;
- means for forming a set of coefficients for each resample area, said coefficients comprising fractions whose denominators are a function of the resample area and whose numerators are a function of an area of each implied sample area that may partially overlap said resample area;
- means for multiplying the input image data for each implied sample area by a coefficient resulting in a product; and
- means for adding each product to obtain a luminance value for each resample area.
14. The system as recited in claim 13 wherein a plurality of resample areas for each color sub-pixel in the display forms a resample area array, and wherein the system further comprises:
- means for determining a phase relationship among the resample area arrays for each color sub-pixel.
15. The system as recited in claim 14 wherein means for determining a phase relationship further comprises:
- means for positioning resample points for each said color resample areas such that the resample points for said second color and said third color substantially overlay the resample points for said first color.
16. The system as recited in claim 13 wherein said first color is green, and said second and third colors are red and blue respectively;
- wherein said set of coefficients for said resample areas for the green color comprises a unity filter; and
- wherein said set of coefficents for said resample areas for the red and blue colors are each a 3×3 filter coefficient matrix.
17. The system as recited in claim 16 wherein said unity filter is centered to substantially match an input pixel by adjusting said filter with respect to a sub-pixel grid.
18. The system as recited in claim 12 wherein said eight sub-pixels of said sub-pixel group are disposed in two rows of four sub-pixels, and wherein two sub-pixels of said first color, one sub-pixel of said second color and one sub-pixel of said third color are disposed in each of said two rows.
19. The system as recited in claim 12 wherein said eight sub-pixels of said sub-pixel group are disposed in two rows of four sub-pixels, and wherein said checkerboard pattern is formed by one of said sub-pixel of said second color following one of said sub-pixel of said third color in a first row, and one of said sub-pixel of said third color following one of said sub-pixel of said second color in a second row.
20. The system as recited in claim 12 wherein a combined area of said two sub-pixels of said first color is substantially equal to the area of one of said sub-pixel of said second color and said sub-pixel of said third color.
21. The system as recited in claim 12 wherein said eight sub-pixels of said sub-pixel group are disposed in two rows of four sub-pixels, and wherein said sub-pixels of said first color are disposed in columns in said sub-pixel group.
22. The system as recited in claim 21 wherein a first one of said columns of said sub-pixels of said first color is offset from a second one of said columns of said sub-pixels of said first color in said sub-pixel group.
23. The system as recited in claim 12 wherein said system utilizes one of a group of display technologies, said group of technologies comprising passively addressed Liquid Crystal Display (LCD), ElectroLuminescent (EL) Display, Plasma Display, passively addressed Inorganic Light Emitting Diode, Organic Light Emitting Diode Display, Active Matrix Liquid Crystal Display (AMLCD), and Active Matrix Organic Light Emitting Diode Display (AMOLED).
24. A method of rendering input image data specified in a first format comprising first, second and third color data values onto a display panel substantially comprising a sub-pixel repeating group comprising eight sub-pixels of first, second and third colors disposed in two rows; said sub-pixel repeating group further comprising two sub-pixels of said first color, one sub-pixel of said second color and one sub-pixel of said third color disposed in each of said two rows; the method comprising:
- determining a plurality of input sample areas for said input image data; each said input sample area representing one input image pixel indicating first, second and third color data values in said input image data;
- determining a first color resample area array for said first color sub-pixels on the display panel; said first color resample area array comprising a plurality of first color resample areas each comprising a first color resample point such that one first color resample point represents one first color sub-pixel on the display panel;
- for each first color resample point in said first color resample area array, assigning said first color data value of said one input image pixel represented by a corresponding implied sample area to a first luminance value for said first color sub-pixel represented by said first color resample point;
- determining a second color resample area array and a third color resample area array for said respective second color and third color sub-pixels on the display panel; each of said second color and third color resample area arrays comprising a plurality of respective second color and third color resample areas each comprising respective second color and third color resample points such that one second color resample point represents one second color sub-pixel on the display panel and one third color resample point represents one third color sub-pixel on the display panel;
- computing a set of coefficients for each of said second color resample areas and said third color resample areas, said coefficients comprising fractions whose denominators are a function of the respective resample area and whose numerators are a function of any partial area of each input sample area that may overlap said respective resample area when said respective resample area array overlays said input sample areas; and
- producing a second luminance value and a third luminance value for each respective second color sub-pixel and third color sub-pixel on the display panel by multiplying respective ones of said coefficients of a corresponding resample area by respective second color and third color data values of the input image data for each input sample area overlaid by said resample area, and adding the resulting products.
25. The method as recited in claim 24 wherein said first color is green, said second color is red and said third color is blue; said sub-pixel repeating group comprising two green sub-pixels, one blue sub-pixel and one red sub-pixel disposed in each of said two rows.
26. The method as recited in claim 25 wherein a combined area of said two green sub-pixels disposed in each row is substantially equal to the area of one of said blue sub-pixel and said red sub-pixel.
27. The method as recited in claim 24 wherein said first color is green, and wherein said sub-pixel repeating group comprises four green sub-pixels disposed in columns in said sub-pixel repeating group.
28. The method as recited in claim 24 wherein said sub-pixels of said second color and said sub-pixels of said third color form substantially a checkerboard pattern in said two rows such that a sub-pixel of said second color is followed by a sub-pixel of said third color in said first row, and a sub-pixel of said third color is followed by a sub-pixel of said second color in said second row.
29. The method as recited in claim 24 wherein each of said respective second color and third color resample areas overlaps at least two partial rows of input sample areas representing input image pixels in said input image data.
30. The method as recited in claim 24 wherein each of said respective second color and third color resample areas overlaps at most one partial row of input sample areas representing input image pixels in said input image data.
31. The method as recited in claim 24 wherein a plurality of said respective second color and third color resample areas has a diamond shape.
32. The method as recited in claim 24 further comprising determining a phase relationship among said first, second and third resample area arrays.
33. The method as recited in claim 32 wherein determining a phase relationship among said first, second and third resample area arrays comprises positioning said first, second and third color resample points for each respective first, second and third color resample area such that said first, second and third color resample points are substantially coincident.
34. The method as recited in claim 32 wherein determining a phase relationship among said first, second and third resample area arrays comprises positioning said first, second and third color resample points for each respective first, second and third color resample area such that none of said first, second and third color resample points are substantially coincident.
35. The method as recited in claim 24 wherein the step of computing a set of coefficients for each of said second color resample areas and said third color resample areas comprises computing a 3×3 filter coefficient matrix having the values 0 0.125 0 0.125 0.5 0.125 0 0.125 0.
36. The method as recited in claim 24 wherein the step of computing a set of coefficients for each of said second color resample areas and said third color resample areas comprises computing a 3×2 filter coefficient matrix having the values 0.0625 0.0625 0.375 0.375 0.0625 0.0625.
37. The method of claim 24 wherein said display panel is an element of a display system utilizing one of a group of display technologies, said group of technologies comprising passively addressed Liquid Crystal Display (LCD), ElectroLuminescent (EL) Display, Plasma Display, passively addressed Inorganic Light Emitting Diode, Organic Light Emitting Diode Display, Active Matrix Liquid Crystal Display (AMLCD), and Active Matrix Organic Light Emitting Diode Display (AMOLED).
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Type: Grant
Filed: Oct 22, 2002
Date of Patent: Feb 17, 2009
Patent Publication Number: 20030128225
Assignee: Samsung Electronics Co., Ltd. (Suwon-si, Gyeonggi-do)
Inventors: Thomas Lloyd Credelle (Morgan Hill, CA), Candice Hellen Brown Elliott (Vallejo, CA), Michael Francis Higgins (Cazadaro, CA)
Primary Examiner: Sumati Lefkowitz
Assistant Examiner: Alexander S. Beck
Attorney: MacPherson Kwok Chen & Heid LLP
Application Number: 10/278,353
International Classification: G09G 3/28 (20060101); G09G 3/32 (20060101); G09G 3/36 (20060101); G09G 5/00 (20060101); G06F 3/038 (20060101); G02F 1/1335 (20060101);